CalcBoard - Multi Calculator
Side-by-Side Calculations
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Run up to 8 calculators side by side — compare prices, convert units, and see hex and decimal at once. No ads, no subscriptions. Premium is $2.99, once.
CalcBoard is a calculator with no ads, no subscriptions, and no tracking. Compare prices side by side, run multiple calculations at once, and get precise results — without a single pop-up interrupting your math.
NO ADS. NO SUBSCRIPTIONS. EVER.
CalcBoard will never interrupt your calculations with pop-ups, banners, or full-screen ads. Premium features are available through a single one-time purchase — no monthly charges, no recurring fees.
COMPARE PRICES SIDE BY SIDE
Shopping for the best deal? Open two calculators on the same screen and compare unit prices, discounts, or totals without switching back and forth. CalcBoard is the fastest way to figure out which option actually saves you money.
MULTIPLE CALCULATORS, ONE SCREEN
Run up to eight independent calculator panels simultaneously. Compare prices, check homework, run different scenarios, or calculate tips for a split bill — all without losing your place.
SEE YOUR WORK
Every expression stays visible as you type — no more guessing what you entered. Every calculation is saved automatically; bookmark and label the important ones, and with Premium search your full history and export it to CSV.
FOUR POWERFUL MODES
• Basic — Clean, fast arithmetic for everyday math
• Scientific — Trig, logs, exponents, and advanced functions
• Programmer — Hex, binary, octal, and decimal shown at the same time, with bitwise operations
• Unit Converter — 79 units across 10 categories: length, mass, temperature, area, speed, time, data, volume, energy, pressure
SHARED VALUE TRAY
Push any result to the shared value tray and pull it into another panel. Chain calculations across panels without retyping numbers.
NAMED VARIABLES
Type tax=0.0825 once, then use price*tax in any panel. Your variables persist between sessions and work in every calculator mode.
INSTANT ACCESS FROM CONTROL CENTER (iOS)
Add CalcBoard to your iPhone's Control Center and launch it in a single tap from any screen — no hunting through your home screen. Open Settings → Control Center to add the CalcBoard control.
PRECISE RESULTS
CalcBoard uses arbitrary-precision decimal arithmetic. No floating-point rounding errors. 0.1 + 0.2 = 0.3, exactly.
YOUR DATA STAYS ON YOUR DEVICE
No ad SDKs, no analytics trackers, no unnecessary permissions. Your calculations are stored locally and never leave your device.
DESIGNED FOR EVERYONE
• VoiceOver and TalkBack labels on every key
• Light and dark themes with 8 color options and 6 button styles
• Large touch targets and haptic feedback on every button
• Full iPad support with Split View and hardware keyboards
FREE TO START, PAY ONCE TO UNLOCK
Two calculator panels and basic mode are free, forever. One purchase unlocks everything — scientific mode, programmer mode, full unit converter, extra panels, shared value tray, full history with search and export, themes, and more. No subscriptions. No recurring charges.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
- Reliability fixes: a hardened expression engine and correct restore of your panels, variables, and layout on relaunch.
- Now requires iOS 16 or later.
- Rate CalcBoard without leaving the app — a single optional prompt after you've used it a while. Never a nag.
The developer, Colby Clark, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Colby Clark
- Size
- 52.7 MB
- Category
- Utilities
- Compatibility
Requires iOS 16.0 or later.
- iPhone
Requires iOS 16.0 or later. - iPad
Requires iPadOS 16.0 or later. - Mac
Requires macOS 13.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- CalcBoard Premium $2.99
- Copyright
- © Solutionflare